Machine for undermining coal.



N0. 65|,768. Patented June I2, I900.

A. OCHTINSKY.

MACHINE FOR UNDERMINING COAL.

[Applicatiozi filed Feb. 15, 1900.

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MACHINE FOR UNDERMINING COAL.

Application filed Feb. 15, 1900.) (No Model.) 2 Sheets-Sheet 2.

Z% 2 5% I W f UNITED STATES PATENT OFFICE.

ANDI' OCHTINSKY, OF ROOKVALE, COLORADO. I

MACHINE FOR UNDERMINING COAL.

SPECIFICATION forming part of Letters Patent N 0. 651,768, dated June12, 1900.

Application filed February I5. 1900. Serial No. 5,404. (No model.)

'To ti/Z whom it may concern.-

Be it known that I, ANDI OCHTINSKY, of Rockvale, in the county ofFremont and State of Colorado, have invented a new and usefulImprovement in Coal-Mining Machines, of which the following is aspecification.

My invention relates to mining-machines, and has for its object aportable machine of this class adapted to be operated by hand andcapable of easy shift laterally and in an advanced direction as thepicks undermine the coal.

The invention consists in special forms of devices for feeding themachine forward and for turning it laterally and other details ofconstruction and arrangements of the parts, which I shall hereinafterspecifically describe and claim.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which like characters of reference indicatecorresponding parts in all the views.

Figure 1 is a side elevation of my improved hand operated coalundermining machine. Fig. 2 is a plan view thereof. Fig. 3is a longitudinal section thereof, and Fig. 4 is a rear view.

In the hollow upright standards E of the machine are fitted posts a a,held at various elevations by means of clamps S and connected at theirupper ends by a cross-bar D, in which is fitted a socket d, fastened inplace by a thumb-screw c. A tapering spike a, provided with a cross-pinb, is received in said socket and is adapted for engagement with theroof of the drift in which the machine is working.

Between the standards E extend horizon-, tal guides L, in which plateslare fitted to.

move, said plates forming part of the bed which supports all the drivingor operating mechanism of the machine. This latter consists of a crankedtransverse shaft R, on

whose cranked portions are mounted tubular.

arms 0, in which the pick-bars g are adjustably fitted and are held inproper adj ustment by clamping-screws F. Each bar 9 at its forward endis inserted in a socket-piece P, and these latter have the pick bladesor teeth A held therein by set-screws. To turn the shaft R to cause thereciprocation of the picks, I provide the shaft with a pinion m,

which meshes with a large gear-wheel W on a shaft W, journaled inuprights rising from the plates 1. The shaft 7' constitutes the maindriving-shaft of the machine and is operated by hand by means ofahandled wheel G and by means of a vertically vibrating hand-rod '0,mounted between short posts '11 and connected by a link q with cranks onthe shaft, as shown in Figs. 3 and 4:.

I purpose feeding the operating parts of the machine forward as thepicks cut into the coal, and to this end I provide a verticallyswinginglever h, having a pawl 11 engaging teeth o n'a rack-bar T, heldstationary in the machine. A spiral spring is arranged beneath the leverh and connected with the pawl 'i-for the purpose of retractingthelatter. It is evident, therefore, referring especially to Fig. 3, thatthe operator, by repeatedly pressing down on the lever it, will causethe plates Z and the whole operating part of the machine to move forwardstep by step as the picks out into the coal. The operation is begun withthe picks and pick-bars at the inward limit of their position in theirsockets, and the machine is fed forward, as above described, as far aspossible. A pawl G is connected with lever h by a rod, as shown in T,and the machine is then drawn backward in its guides by the bar Y, theadjustment of the pick-bars is lengthened, and the feeding operation isrepeated.

To support and guide the picks, the wheelsupported guide M is provided,and in front of the said guide is located a slate-shovel S. J designateshandles used in wheeling the machine from place to place and insteadying the machine While it is being operated.

In connection with the roof-engaging devices before described it isexpedient to brace the machine on the flopr of the drift, and for thispurpose a bar (1 (Z, provided with spikes w, is attached to aratchet-wl1eel K, and both pivoted centrally and horizontallyto andbeneath the main frame. A spring-pawlM engages the ratchet-wheel andserves to lock it and the bar in any desired position. The bar h isaffixed to it, and a means for fasteningd may be rotated and shifted asrequired to accommodate it to the floor of thedrift,

or, in other words, so that it may take a firm hold thereon. The wheelsT are mounted on a cranked axle, which may be rotated to raise or lowerthe wheels, so that the spikes l of bar (1 d may the more firmly engagethe drift-floor. To rotate the axle, a lever-arm it in position to holdthe wheels down or up is provided at t and n.

Having thus describedvmy invention, what i I claim as new, and desire tosecure by Letters Patent, is-

der and attached to themain frame, and a spring-pawl adapted to engagethe ratchetwheel, as shown and described for the purposespecified.

2.'In a mining-machine, the combination with the main frameand pickmechanism, of hollow standards E fixed on said frame, posts a fittedslidablytherein, a cross-bar connectingthe posts, and a drift-roof spikemounted adj ustably on said bar, a ratchet-wheel and 1 bar-carryingspikes, arranged horizontally beneath the frame, and a pawl for engagingthe ratchet-wheel, as shown and described.

In testimony whereof I have signed my name to this specification in thepresence-of subscribing witnesses.

'ANVDI OC-I-ITINSKY.

Witnesses:

THOMAS QUIINE, PROSPER FAES, JOE H. POWELL.

